[PATCH] ALSA: ac97: drop stale CMI9738 PCM-volume quirk

[Cássio Gabriel]

patch_cm9738() still carries an old comment claiming that CMI9738
has no PCM volume although AC97_PCM reacts, and then forces
AC97_HAS_NO_PCM_VOL.

The CMI9738 datasheet documents register 0x18 as "PCM Out Vol"
with mute and left/right volume fields, so that old assumption is
not justified.

Remove the comment together with the no-PCM-volume override and let
the generic AC97 mixer code probe AC97_PCM normally. It already
checks the mute bit and the register's volume resolution before
exposing controls.

This change is intentionally limited to CMI9738.

Signed-off-by: Cássio Gabriel <cassiogabrielcontato@xxxxxxxxx>
---
 sound/pci/ac97/ac97_patch.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/sound/pci/ac97/ac97_patch.c b/sound/pci/ac97/ac97_patch.c
index 64cc39dd2008..5e9f70c47ed5 100644
--- a/sound/pci/ac97/ac97_patch.c
+++ b/sound/pci/ac97/ac97_patch.c
@@ -3002,9 +3002,6 @@ static const struct snd_ac97_build_ops patch_cm9738_ops = {
 static int patch_cm9738(struct snd_ac97 * ac97)
 {
 	ac97->build_ops = &patch_cm9738_ops;
-	/* FIXME: can anyone confirm below? */
-	/* CM9738 has no PCM volume although the register reacts */
-	ac97->flags |= AC97_HAS_NO_PCM_VOL;
 	snd_ac97_write_cache(ac97, AC97_PCM, 0x8000);
 
 	return 0;

---
base-commit: 116ed8afab5e3217561a6a8bc4ca1c3d5d97830c
change-id: 20260429-ac97-cmi9738-pcm-volume-898bf48a92dd

Best regards,
--  
Cássio Gabriel <cassiogabrielcontato@xxxxxxxxx>